Lead Fullstack Engineer (Typescript/Node.js) with German

Ersilia; Hofheim am Taunus; In loco; EUR 70.000 - 110.000; Tempo pieno

Descrizione del lavoro

Ersilia is building a digital twin platform for the energy transition. Join a team delivering data-driven insights and scalable backend services using TypeScript/Node.js, Golang, and Python, integrated with AWS and PostgreSQL.

You will work directly with German-speaking clients, design robust APIs (REST/gRPC), and help shape architecture in a fast-moving, highly agile environment that values ownership and high-performance systems.

Competenze

• 5+ years of experience in backend development.
• Strong commercial experience with TypeScript and Node.js.
• Experience designing scalable backend services and microservices.
• Fluent German (C1/C2) – mandatory.
• Experience working directly with clients.
• Experience with AWS and cloud environments.
• Solid knowledge of PostgreSQL and database design.
• Good understanding of Docker and Kubernetes.
• Experience designing and developing REST and/or gRPC APIs.
• Very good command of English.

Mansioni

• Design, develop, and maintain scalable backend services using TypeScript/Node.js as the primary technology stack.
• Contribute to the development of microservices built with Golang and Python.
• Collaborate directly with German-speaking clients and stakeholders to understand requirements and propose technical solutions.
• Build and optimize PostgreSQL data models and queries.
• Develop and maintain APIs using gRPC and REST.
• Containerize applications with Docker and manage deployments on Kubernetes (AWS).
• Contribute to architecture decisions for distributed systems.
• Ensure system scalability, performance, and reliability.
• Collaborate with frontend (Angular) and backend (NestJS) teams.
• Work independently from concept to production delivery.
• Participate in agile ceremonies, code reviews, and continuous improvement initiatives.

Conoscenze

Years of backend experience

TypeScript/Node.js

Backend/microservices design

German (C1/C2)

Client collaboration

AWS

PostgreSQL

Docker

Kubernetes

REST/gRPC APIs

English proficiency

Strumenti

Golang

Python

NestJS

Angular

Svelte

RabbitMQ

AWS SQS

Docker

Kubernetes

AWS

PostgreSQL

Descrizione del lavoro

Project description

You will join the development of an advanced digital twin platform for the energy transition, designed to unify energy and climate-related data into a single, comprehensive solution.

The platform supports stakeholders involved in energy transformation by providing data-driven insights and decision-making tools. It addresses key challenges such as CO₂ balancing, renewable energy expansion, power grid planning, and municipal heating strategies.

Built on a modular and scalable architecture, the solution enables complex analytics and supports real-time insights in a rapidly evolving energy sector.

Tech stack

• TypeScript & Node.js (core technologies)

• Golang (microservices, gRPC-based services)

• Python (ETL-related components)

• PostgreSQL

• Redis (Key-Value stores)

• gRPC & REST APIs

• Docker & Kubernetes

• AWS (cloud infrastructure)

• RabbitMQ / AWS SQS (event-driven architecture)

• NestJS

• Angular / Svelte (collaboration exposure)

Requirements

• 5+ years of experience in backend development

• Strong commercial experience with TypeScript and Node.js (key requirement)

• Experience designing and developing scalable backend services and microservices

• Fluent German (C1/C2) – mandatory, with the ability to communicate confidently with business stakeholders and clients

• Experience working directly with clients, including requirements gathering, solution discussions, and ongoing collaboration

• Experience with AWS services and cloud-based environments

• Solid knowledge of PostgreSQL and database design for scalable, high-performance systems

• Good understanding of Docker and Kubernetes

• Experience designing and developing REST and/or gRPC APIs

• Ability to work independently, take ownership, and drive solutions from concept to delivery

• Strong communication and problem-solving skills

• Very good command of English

Nice to have

• Experience with Golang

• Experience with Python (especially in ETL processes)

• Familiarity with NestJS framework

• Knowledge of event-driven architectures (RabbitMQ, AWS SQS)

• Exposure to Angular or Svelte frontend technologies

• Knowledge of the energy or electric energy industry domain

• Experience working within highly agile environments

• Experience using AI tools in day-to-day work

Main responsibilities

• Design, develop, and maintain scalable backend services using TypeScript/Node.js as the primary technology stack

• Contribute to the development of microservices built with Golang and Python

• Collaborate directly with German-speaking clients and stakeholders to understand requirements and propose technical solutions

• Build and optimize PostgreSQL data models and queries

• Develop and maintain APIs using gRPC and REST

• Containerize applications with Docker and manage deployments on Kubernetes (AWS)

• Contribute to architecture decisions for distributed systems

• Ensure system scalability, performance, and reliability

• Collaborate with frontend (Angular) and backend (NestJS) teams

• Work independently from concept to production delivery

• Participate in agile ceremonies, code reviews, and continuous improvement initiatives